GE UR9EV UR 9EV Protection Relay CPU Module

Product Details

UR9EV UR 9EV Product Description

The GE UR9EV is a system-ready CPU module engineered for deployment within the GE UR Series Universal Relay platform — one of the most widely adopted protection relay architectures in transmission, distribution, and industrial power systems. Designed to serve as the central processing and coordination node within a UR chassis, the UR9EV integrates protection logic execution, inter-module communication, and system-level diagnostics into a single, field-proven module. Its architecture supports seamless Contextual Integration across the full UR platform ecosystem, enabling engineers to build scalable, redundancy-capable protection and control systems with consistent firmware governance and long-term maintainability.

Unlike standalone relay units, the UR9EV is purpose-built for rack-based, multi-slot UR chassis deployments where the CPU module coordinates with dedicated I/O, communications, and power supply modules to form a complete protection system. This modular approach reduces wiring complexity, simplifies commissioning, and provides a clear upgrade path as system requirements evolve. With a 12-Month Warranty covering all hardware and firmware functions, the UR9EV is a reliable long-term investment for critical infrastructure projects.

The UR9EV CPU module is the coordination hub of a layered UR Series protection architecture. Its value is fully realized when deployed alongside the complete range of UR platform modules, each contributing a distinct functional layer to the overall system.

At the power layer, the UR9PA or UR9PB power supply modules provide regulated DC power to the chassis backplane, ensuring stable voltage delivery to the UR9EV and all co-installed modules. Power supply redundancy can be achieved by installing dual power modules in supported chassis configurations, eliminating single points of failure in critical substation environments.

At the I/O layer, UR Series analog input modules (such as the UR9CT for current transformer inputs and UR9VT for voltage transformer inputs) feed real-time electrical measurements directly to the UR9EV for protection algorithm execution. Digital I/O modules handle binary status inputs and control outputs, enabling the CPU to respond to breaker status, trip signals, and external interlocks with deterministic timing.

At the communications layer, UR Series communications modules — including Ethernet-based IEC 61850 modules and serial DNP3/Modbus modules — extend the UR9EV's data to SCADA systems, RTUs, and substation automation networks. GOOSE messaging over IEC 61850 enables peer-to-peer protection coordination between UR relays without relying on hardwired intertripping, significantly reducing wiring and improving response time in bus protection and line differential schemes.

At the HMI layer, the UR Series front panel display module provides local operator access to protection settings, event records, and fault data captured by the UR9EV. Remote HMI access is supported through EnerVista UR Setup software, which connects via Ethernet to retrieve oscillography, sequence of events (SOE) logs, and real-time metering data for engineering analysis and post-fault review.

At the control and logic layer, the UR9EV executes FlexLogic — GE's graphical logic programming environment — allowing engineers to implement custom protection schemes, interlocking logic, and automation sequences without external PLCs. This reduces panel footprint and eliminates inter-device communication latency in time-critical protection applications.

For redundancy and high-availability architectures, the UR9EV supports dual-CPU configurations in select UR chassis, where a standby CPU module mirrors the active unit and assumes control within milliseconds of a primary module failure. This hot-standby architecture is particularly valuable in generator protection, transformer differential, and bus protection applications where relay unavailability carries significant operational risk.

Complementary products commonly deployed alongside the UR9EV include: UR9PA / UR9PB (power supply modules), UR9CT (current input module), UR9VT (voltage input module), UR9DI / UR9DO (digital I/O modules), UR9C1 / UR9C2 (communications modules for IEC 61850 and serial protocols), UR9FP (front panel HMI module), and UR9BP (chassis backplane). Together, these modules form a fully integrated, field-configurable protection and control platform.

Transmission and Distribution Substations: The UR9EV is widely deployed in 110 kV to 500 kV transmission substations for line distance protection, transformer differential protection, and bus protection schemes. Its IEC 61850 GOOSE capability enables station-bus protection coordination without auxiliary relays, reducing substation wiring by up to 40% in modern digital substation designs.

Power Generation Facilities: In thermal, hydro, and wind generation plants, the UR9EV serves as the generator protection relay CPU, executing loss-of-field, out-of-step, stator ground fault, and rotor ground fault protection functions. Its FlexLogic environment allows plant engineers to implement unit protection schemes tailored to specific generator characteristics without custom firmware development.

Petrochemical and Refinery Plants: In high-continuity process environments, the UR9EV's dual-CPU redundancy capability supports uninterrupted protection coverage during planned maintenance. Its event logging and oscillography capture provide the post-fault data required for root cause analysis in compliance with IEC and IEEE protection standards.

Water and Wastewater Treatment: Municipal utilities deploy the UR9EV in medium-voltage motor protection and feeder protection applications, where its Modbus TCP interface integrates with plant SCADA systems for remote monitoring of protection status, metering data, and alarm conditions.

Mining and Metals Processing: In high-load, high-fault-current mining environments, the UR9EV's robust hardware design and configurable protection settings support the demanding electrical characteristics of large drive systems, transformer feeders, and underground distribution networks.

Marine and Offshore Platforms: The UR9EV's wide operating temperature range and vibration-tolerant chassis mounting make it suitable for offshore platform power management systems, where protection relay reliability directly impacts production continuity and personnel safety.

Q1: Is the UR9EV compatible with all UR Series chassis configurations, and can it be mixed with older UR module generations? The UR9EV is designed for UR Series chassis and is compatible with current-generation UR I/O, communications, and power supply modules. Compatibility with earlier UR module generations depends on firmware revision alignment — GE recommends verifying firmware compatibility using EnerVista UR Setup before mixing module generations in a single chassis. NANKMOS supplies UR9EV units with verified firmware and can advise on chassis-level compatibility for specific project configurations.

Q2: What commissioning tools and procedures are required to bring a UR9EV-based protection system into service? Commissioning a UR9EV system requires GE's EnerVista UR Setup software for settings upload, logic verification, and communications configuration. Secondary injection testing using a relay test set (e.g., Omicron CMC series or equivalent) is standard practice for verifying protection element pickup and timing. NANKMOS provides pre-shipment functional testing on all UR9EV units, including power-on verification and basic communications check, reducing on-site commissioning time and risk.

Q3: What does the 12-Month Warranty cover, and what is the process for warranty claims or long-term spare parts support? The 12-Month Warranty covers hardware defects and firmware-related failures under normal operating conditions from the date of shipment. Warranty claims are processed through NANKMOS directly — contact [email protected] with the order reference and fault description to initiate a return or replacement. For long-term spare parts planning, NANKMOS maintains stock of UR9EV and complementary UR Series modules to support multi-year maintenance contracts and emergency replacement requirements.